CSL Collapse Model Mapped with the Spontaneous Radiation

Kristian Piscicchia,Angelo Bassi,Beatrix Hiesmayr,Raffaele Grande,Sandro Donadi,Catalina Curceanu,Andreas Pichler

doi:10.3390/e19070319

Abstract

In this paper, new upper limits on the parameters of the Continuous Spontaneous Localization (CSL) collapse model are extracted. To this end, the X-ray emission data collected by the IGEX collaboration are analyzed and compared with the spectrum of the spontaneous photon emission process predicted by collapse models. This study allows the obtainment of the most stringent limits within a relevant range of the CSL model parameters, with respect to any other method. The collapse rate λ and the correlation length r C are mapped, thus allowing the exclusion of a broad range of the parameter space.

Highlights

The Continuous Spontaneous Localization (CSL) Collapse ModelCollapse models are phenomenological models introduced to solve the measurement problem of quantum mechanics and explain the quantum-to-classical transition [1,2,3,4,5,6]
The X-ray emission data collected by the IGEX collaboration are analyzed and compared with the spectrum of the spontaneous photon emission process predicted by collapse models
The interaction with the noise field causes an extra emission of electromagnetic radiation for charged particles [7], which is not predicted by standard quantum mechanics

Summary

The CSL Collapse Model

Collapse models are phenomenological models introduced to solve the measurement problem of quantum mechanics and explain the quantum-to-classical transition [1,2,3,4,5,6] According to these models, the linear and unitary evolution given by the Schrödinger equation is modified by adding a non-linear term and the interaction with a stochastic noise field. The linear and unitary evolution given by the Schrödinger equation is modified by adding a non-linear term and the interaction with a stochastic noise field These modifications have two very important consequences: (i) they lead to the collapse of the wave function of the system in space (localization mechanism) and (ii) the collapse effects get amplified with the mass of the system (amplification mechanism). This gives a considerable reduction of the possible values in the parameter space of collapse models

The Collapse Rate Parameter λ

A New Limit on λ

Procedure and Results

Mapping CSL Parameters Space

Conclusions and Perspectives